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Table 4 Spline regression analysis, Duodenal perforated ulcers

From: Decreasing incidence of peptic ulcer complications after the introduction of the proton pump inhibitors, a study of the Swedish population from 1974–2002

  Males   Females  
Year Coef. 95% Conf. interval Coef. 95% Conf. interval
1975 -0.17 -0.44
0.09
-0.21 -0.58
0.16
1980 0.01 -0.04
0.05
-0.00 -0.06
0.06
1985 0.02 -0.02
0.06
0.10 0.04
0.16
1990 0.03 -0.004
0.07
0.05 -0.01
0.10
1995 -0.05 -0.09
-0.01
-0.04 -0.09
0.01
2000 -0.11 -0.14
-0.08
-0.09 0.13
0.05